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Hi,
I´m very satisfied with my laser. Its working perfect.
But I have an issue.
If I load a pic (jpg) with PicCarve and press than Generate it isn´t the same logo as it was.
The software adds some lines.
I tired all possibilities to load a pic but this happens all the time.
What can I do?
Thanks a lot
Robert
PS: how can I upload a pic here?

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@marco_b You are right. The spot size is probably 0.12 or slightly larger so 0.08 is over scanning but it is close to 300dpi (318dpi to be precise). The majority of burn happens in the center 75% of the spot so this isn't as bad as it seems and if you want small images at very high quality it's totally acceptable.

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I have a3 that does not have firmware or connectors. How do you install the add on board? Plus you should need two pins on the nano for x and y homing. If you solder on the nano direct and burn it?
In volume, the pcb bare should be less then 1 dollar from china

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@heedaf EleksEgg works perfectly with T2Laser although I will say after making a bunch of custom golf balls with sharpie markers it's been put away and not used since. You could probably just use the trial (if you don't want to support me by registering) as the 10,000 line G-code limit for raster and 1,000 line for vector is probably enough for such a small machine.

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@jbke89 It's a TTL output from the Nano so the voltages should be low (<~0.8V) or high (>~2.5V), but since it's a PWM signal you will get varied measurements using a volt meter. Using an oscilloscope you would see the levels and modulated square wave output.

In this case it sounds like your output is always low but the laser is always on, likely a pull down resistor would fix that but the real problem is why it doesn't turn on. Are you getting the Grbl connect string? If not, your Nano needs to be flashed.

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@Zax i tri a second pass with lower feed rate (800)
wheels are ok
nop, i use 0.9 (i can upload 1.1 in oem Nano ?)

other thing, can we optimize the gcode?
what I mean to say is that to make 1 frame of outline, the laser makes endless passes, by slice of 1 on Y
can we optimize the gcode so that it makes the laser make every feature of the frame at once (I do not know if I express my idea and my thought)